Steel cable type interlocking mechanism of low-voltage switch cabinet circuit breaker

Abstract

The utility model discloses a steel cable type interlocking mechanism of a low-voltage switch cabinet circuit breaker, which belongs to the field of low-voltage power distribution cabinets and comprises a cabinet body, a circuit breaker and a cabinet door, the circuit breaker is fixedly connected inside the cabinet body, and the cabinet door is movably connected to one side of the front end of the cabinet body through a hinge. A lock hole is formed in the middle of the side, away from the connection position of the cabinet body, of the cabinet door, a steel cable locking control mechanism is movably connected into the lock hole, a double-interlocking mechanism is fixedly connected to the side, away from the connection position of the cabinet door, of the interior of the cabinet body, and through the steel cable locking control mechanism and the double-interlocking mechanism, the cabinet door can be conveniently formed after power failure; meanwhile, the safety risk is reduced, double locking is achieved, the equipment safety is enhanced, and the situation that the cabinet door can be opened at will under the condition that the circuit breaker is not powered off, and consequently safety accidents are caused is prevented.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage distribution cabinets, and more specifically, to a steel cable interlocking mechanism for a low-voltage switchgear circuit breaker. Background Technology

[0002] The low-voltage distribution cabinet is used for power, lighting and power distribution in a power distribution system with a rated current of AC 50Hz and a rated voltage of 380V. It is characterized by strong breaking capacity, good dynamic and thermal stability, flexible electrical scheme, convenient combination, strong series and practicality, and novel structure.

[0003] When using existing low-voltage switchgear circuit breakers, it is generally stipulated that the cabinet door cannot be opened when the power is not off. In the event of a fault, it is difficult to determine whether the circuit breaker is de-energized, and other tools are required for testing. The cabinet can only be opened after confirming that the power is off. This operation reduces the efficiency of maintenance or testing. At the same time, the existing cabinet locking method is simple and increases the safety risk. Therefore, we have proposed a steel cable interlocking mechanism for low-voltage switchgear circuit breakers to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a steel cable interlocking mechanism for a low-voltage switchgear circuit breaker. Through a steel cable interlocking control mechanism and a double interlocking mechanism, it enables easy opening of the cabinet door after power failure while reducing safety risks. Furthermore, it achieves double locking, enhancing equipment safety and preventing the cabinet door from being opened arbitrarily when the circuit breaker is not de-energized, thereby preventing safety accidents.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A cable-type interlocking mechanism for a low-voltage switchgear circuit breaker includes a cabinet, a circuit breaker, and a cabinet door. The circuit breaker is fixedly connected to the inside of the cabinet, and the cabinet door is movably connected to the front side of the cabinet via a hinge. A lock hole is provided in the middle of the side of the cabinet door away from the cabinet connection, and a cable locking control mechanism is movably connected inside the lock hole. A double interlocking mechanism is fixedly connected to the inside of the cabinet away from the cabinet door connection.

[0009] Furthermore, the steel cable locking control mechanism includes a handle, a connecting shaft, a lock cylinder, a steel cable, a control shaft, and a torque spring. The handle is fixedly connected to one end of the connecting shaft, and the lock cylinder is fixedly connected to the other end of the connecting shaft. One end of the steel cable is wound and fixedly connected to the outside of the control shaft, and the other end of the steel cable is fixedly connected to the bottom edge of the lock cylinder near the outside. The torque spring is sleeved on the outside of one end of the control shaft.

[0010] Furthermore, the handle is located on the outside of the cabinet door, the end of the connecting shaft away from the handle extends through the cabinet door to the lock hole, and the connection between the connecting shaft and the cabinet door is movably connected by a bearing. The lock cylinder, steel cable, control shaft and torque spring are all located inside the lock cylinder.

[0011] Furthermore, the lock cylinder is composed of two symmetrically arranged fan-shaped parts, and a set of symmetrical limiting holes are opened on the surface of the lock cylinder. One side of the lock cylinder extends out of the lock hole, and an extension lock block is fixedly connected to the lock cylinder extending out of the lock hole.

[0012] Furthermore, a sleeve is movably connected to the outer side of the middle portion of the steel cable, and the sleeve is fixedly connected to the inside of the lock cylinder. The two ends of the control shaft are rotatably connected to the inner wall of the lock cylinder, and the two ends of the torque spring are fixedly connected to the outer side of the control shaft and the inner wall of the lock cylinder, respectively.

[0013] Furthermore, the double interlocking mechanism includes a connecting block, a locking groove, a limiting block, a control bar, a return spring, a magnet, and an electromagnet. The locking groove is fixedly connected to one side of the front end of the connecting block. A set of symmetrical connecting holes is opened inside the connecting block. The electromagnets are fixedly connected to the bottom of the connecting holes, and the magnet is located directly in front of the electromagnet. The control bar is fixedly connected to the end of the magnet away from the electromagnet. The limiting block is fixedly connected to the side of the control bar away from the magnet, and the limiting blocks all extend to the outside of the connecting block. The return spring is fixedly connected to the top of the control bar near the limiting block, and the other end of the return spring is fixedly connected to the inside of the mounting hole.

[0014] Furthermore, the electromagnet is electrically connected to the circuit breaker via a wire, and the electromagnet has the same magnetic poles as the magnet after being energized. The limiting block is adapted to the limiting hole, and the extension locking block is adapted to the locking groove.

[0015] 3. Beneficial Effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] (1) In this scheme, the limit of the lock cylinder is released by the steel cable locking control mechanism. Then the handle is turned down and the lock cylinder drives the extension lock block to rotate upward. The extension falls out of the lock groove. Then the handle is pulled to open the cabinet door. While the lock cylinder is rotating, the steel cable extension is pulled and wrapped around the outside of the lock cylinder. At the same time, the middle part of the steel cable slides in the sleeve. Then the other end pulls the control shaft to rotate and loosen the steel cable wrapped around its outside. At this time, the torque spring follows the rotation of the control shaft and is squeezed. When the handle loses control, the torque spring reaction force rotates the control shaft to the initial position. At the same time, the steel cable pulls the lock cylinder to reset. This is beneficial for opening the cabinet door after power failure, while reducing safety risks. Secondly, it achieves double locking and enhances the safety of the equipment.

[0018] (2) In this scheme, the double interlocking mechanism is set up so that when the circuit breaker is completely de-energized, the electromagnet loses its magnetism and the repulsive force between the magnetic poles of the magnet disappears, causing the magnet to be attracted to the electromagnet. At the same time, the reset spring acts on the control bar. Under the double force, the control bar drives the limit block to move away from the limit hole and reset to the inside of the connection hole. At this time, the lock cylinder is released, which helps to prevent the cabinet door from being opened at will when the circuit breaker is not de-energized, thereby causing a safety accident. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the steel cable locking control mechanism of this utility model;

[0021] Figure 3 This is a schematic diagram of the double interlocking mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the control strip connection structure of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Cabinet; 2. Circuit breaker; 3. Cabinet door; 4. Lock hole; 5. Steel cable interlocking control mechanism; 501. Handle; 502. Connecting shaft; 503. Lock cylinder; 504. Steel cable; 505. Control shaft; 506. Torque spring; 6. Double interlocking mechanism; 601. Connecting block; 602. Lock groove; 603. Limit block; 604. Control bar; 605. Return spring; 606. Magnet; 607. Electromagnet; 7. Limit hole; 8. Extension lock block; 9. Connecting hole; 10. Sleeve. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Example 1:

[0027] Please see Figure 1 - Figure 4 A cable-type interlocking mechanism for a low-voltage switchgear circuit breaker includes a cabinet 1, a circuit breaker 2, and a cabinet door 3. The circuit breaker 2 is fixedly connected to the inside of the cabinet 1, and the cabinet door 3 is movably connected to the front side of the cabinet 1 via a hinge. A lock hole 4 is provided in the middle of the side of the cabinet door 3 away from the connection point with the cabinet 1, and a cable locking control mechanism 5 is movably connected inside the lock hole 4. A double interlocking mechanism 6 is fixedly connected to the side of the cabinet 1 away from the connection point with the cabinet door 3.

[0028] Example 2:

[0029] In view of the above embodiment 1, further description is provided, see reference. Figure 1 As shown in the figure, the steel cable locking control mechanism 5 includes a handle 501, a connecting shaft 502, a lock cylinder 503, a steel cable 504, a control shaft 505, and a torque spring 506. The handle 501 is fixedly connected to one end of the connecting shaft 502, and the lock cylinder 503 is fixedly connected to the other end of the connecting shaft 502. One end of the steel cable 504 is wound and fixedly connected to the outside of the control shaft 505, and the other end of the steel cable 504 is fixedly connected to the bottom edge of the lock cylinder 503 near the outside. The torque spring 506 is sleeved on the outside of one end of the control shaft 505. The handle 501 is located on the outside of the cabinet door 3. The end of the connecting shaft 502 away from the handle 501 extends through the cabinet door 3 to the lock hole 4, and the connection between the connecting shaft 502 and the cabinet door 3 is via... The bearing is movably connected. The lock cylinder 503, steel cable 504, control shaft 505, and torque spring 506 are all located inside the lock cylinder 503. The lock cylinder 503 is composed of two symmetrically arranged fan-shaped parts, and a set of symmetrical limiting holes 7 are opened on the surface of the lock cylinder 503. One side of the lock cylinder 503 extends out of the outer side of the lock hole 4, and the lock cylinder 503 extending out of the lock hole 4 is fixedly connected to an extension lock block 8. The middle part of the steel cable 504 is movably connected to a sleeve 10 on the outer side, and the sleeve 10 is fixedly connected to the inside of the lock cylinder 503. The two ends of the control shaft 505 are rotatably connected to the inner wall of the lock cylinder 503, and the two ends of the torque spring 506 are fixedly connected to the outer side of the control shaft 505 and the inner wall of the lock cylinder 503, respectively.

[0030] With the lock cylinder 503 released from its limit, the handle 501 is turned downwards. The lock cylinder 503 drives the extension lock block 8 to rotate upwards, causing the extension to disengage from the lock groove 602. Pulling the handle 501 then opens the cabinet door 3. As the lock cylinder 503 rotates, it pulls the steel cable 504 to extend and wrap around the outside of the lock cylinder 503. At the same time, the middle part of the steel cable 504 slides inside the sleeve 10. Then, the other end pulls the control shaft 505 to rotate and loosen the steel cable 504 wrapped around it. At this time, the torque spring 506 rotates with the control shaft 505 and is squeezed. When the handle 501 loses control, the torque spring 506 reacts and rotates the control shaft 505 back to its initial position. At the same time, the steel cable 504 pulls the lock cylinder 503 to reset. This facilitates opening the cabinet door 3 after power failure, reduces safety risks, and achieves double locking, enhancing equipment safety.

[0031] Example 3:

[0032] In view of the above embodiments 1 and 2, further description is provided, please refer to... Figure 1 , Figure 3 and Figure 4 The double interlocking mechanism 6 includes a connecting block 601, a locking groove 602, a limiting block 603, a control bar 604, a return spring 605, a magnet 606, and an electromagnet 607. The locking groove 602 is fixedly connected to one side of the front end of the connecting block 601. A set of symmetrical connecting holes 9 are opened inside the connecting block 601. The electromagnets 607 are fixedly connected to the bottom of the connecting holes 9, and the magnet 606 is located directly in front of the electromagnets 607. The control bar 604 is fixedly connected to the end of the magnet 606 away from the electromagnet 607. Position block 603 is fixedly connected to the side of control bar 604 away from magnet 606, and limit blocks 603 all extend to the outside of connecting block 601. Reset spring 605 is fixedly connected to the top of control bar 604 near limit block 603, and the other end of reset spring 605 is fixedly connected to the inside of mounting hole. Electromagnet 607 is electrically connected to circuit breaker 2 through wire, and after electromagnet 607 is energized, it has the same magnetic pole as magnet 606. Limit block 603 is adapted to limit hole 7, and extension lock block 8 is adapted to lock groove 602.

[0033] After the circuit breaker 2 completely disconnects the power, the electromagnet 607 loses its magnetism, and the repulsive force between the magnet 606 and the magnetic poles disappears, causing the magnet to be attracted to the electromagnet 607. At the same time, the reset spring 605 acts on the control bar 604. Under the combined force, the control bar 604 moves the limit block 603 away from the limit hole 7 and back to the inside of the connection hole 9. At this time, the limit of the lock cylinder 503 is released, which helps to prevent the cabinet door 3 from being opened at will when the circuit breaker 2 is not disconnected, thereby causing a safety accident.

[0034] Working principle: During use, when the circuit breaker 2 is completely de-energized, the electromagnet 607 loses its magnetism, and the repulsive force between the magnet 606 and the magnetic poles disappears, causing the magnet to be attracted to the electromagnet 607. At the same time, the return spring 605 acts on the control bar 604. Under the combined force, the control bar 604 moves the limit block 603 away from the limit hole 7 and back to the inside of the connecting hole 9. At this time, the limit of the lock cylinder 503 is released, and then the handle 501 is turned downwards. The lock cylinder 503 drives the extension lock block 8 to rotate upwards, and the extension block 8 disengages from the lock groove 60. 2. Pull the handle 501 to open the cabinet door 3. As the lock cylinder 503 rotates, it pulls the steel cable 504 to extend and wrap around the outside of the lock cylinder 503. At the same time, the middle part of the steel cable 504 slides inside the sleeve 10. Then, the other end pulls the control shaft 505 to rotate and loosen the steel cable 504 wrapped around its outside. At this time, the torque spring 506 follows the rotation of the control shaft 505 and is squeezed by force. When the handle 501 loses control, the torque spring 506 reacts and rotates the control shaft 505 to the initial position. At the same time, the steel cable 504 pulls the lock cylinder 503 to reset.

[0035] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A steel cable interlocking mechanism of a low voltage switchgear circuit breaker comprising a cabinet (1), a circuit breaker (2) and a cabinet door (3), characterized in that: The circuit breaker (2) is fixedly connected to the inside of the cabinet body (1), and the cabinet door (3) is movably connected to the front end of the cabinet body (1) through a hinge, a lock hole (4) is formed in the middle of the side of the cabinet door (3) away from the connection with the cabinet body (1), and a steel cable locking control mechanism (5) is movably connected in the lock hole (4), and a double interlocking mechanism (6) is fixedly connected to the side of the cabinet body (1) away from the connection with the cabinet door (3).

2. A low voltage switchgear circuit breaker's steel cable interlocking mechanism as claimed in claim 1, wherein: The steel cable locking control mechanism (5) comprises a handle (501), a connecting shaft (502), a lock cylinder (503), a steel cable (504), a control shaft (505) and a torque spring (506), the handle (501) is fixedly connected to one end of the connecting shaft (502), and the lock cylinder (503) is fixedly connected to the other end of the connecting shaft (502), one end of the steel cable (504) is fixedly connected to the outer side of the control shaft (505), and the other end of the steel cable (504) is fixedly connected to the bottom edge of the lock cylinder (503) close to the outer side, and the torque spring (506) is sleeved on the outer side of one end of the control shaft (505).

3. A low voltage switchgear circuit breaker's steel cable interlocking mechanism as claimed in claim 2, wherein: The handle (501) is located on the outer side of the cabinet door (3), the connecting shaft (502) extends through the cabinet door (3) to the lock hole (4) away from the handle (501), and the connecting shaft (502) is movably connected to the cabinet door (3) through a bearing, and the lock cylinder (503), the steel cable (504), the control shaft (505) and the torque spring (506) are all located in the inside of the lock cylinder (503).

4. A low voltage switchgear circuit breaker's steel cable interlock mechanism as claimed in claim 3 wherein: The lock cylinder (503) is composed of two symmetrical fan-shaped parts, and a group of symmetrical limiting holes (7) are formed on the surface of the lock cylinder (503), one side of the lock cylinder (503) extends out of the outer side of the lock hole (4), and the lock cylinder (503) extending out of the lock hole (4) is fixedly connected with an extension lock block (8).

5. A low voltage switchgear circuit breaker's steel cable interlock mechanism as claimed in claim 3 wherein: The outer side of the middle part of the steel cable (504) is movably connected with a sleeve (10), and the sleeve (10) is fixedly connected to the inside of the lock cylinder (503), both ends of the control shaft (505) are rotatably connected to the inner wall of the lock cylinder (503), and both ends of the torque spring (506) are fixedly connected to the outer side of the control shaft (505) and the inner wall of the lock cylinder (503).

6. A low voltage switchgear circuit breaker's steel cable interlock mechanism as claimed in claim 4 wherein: The double interlocking mechanism (6) comprises a connecting block (601), a lock slot (602), a limiting block (603), a control bar (604), a reset spring (605), a magnet (606) and an electromagnet (607), the lock slot (602) is fixedly connected to the front end of the connecting block (601), a group of left-right symmetrical connecting holes (9) are formed in the connecting block (601), the electromagnet (607) is fixedly connected to the inner bottom of the connecting hole (9), and the magnet (606) is located in front of the electromagnet (607), the control bar (604) is fixedly connected to one end of the magnet (606) away from the electromagnet (607), the limiting block (603) is fixedly connected to one side of the control bar (604) away from the magnet (606), and the limiting block (603) extends to the outside of the connecting block (601), the reset spring (605) is fixedly connected to one side of the top of the control bar (604) close to the limiting block (603), and the other end of the reset spring (605) is fixedly connected to the inside of the mounting hole.

7. A low voltage switchgear circuit breaker's steel cable interlock mechanism as claimed in claim 6 wherein: The electromagnet (607) is electrically connected with the circuit breaker (2) through a wire, and the electromagnet (607) has the same magnetic pole as the magnet (606) after being electrified, the limiting block (603) is matched with the limiting hole (7), and the extension lock block (8) is matched with the lock slot (602).

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